The probation period is less than one month.

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The employer signed a contract with the employee, but the employee resigned after working for less than one month, so the employer has never purchased social security for him. Therefore, the employee did not incur social security expenses in the month of resignation.

Legal basis "Social Insurance Law"

Article 58 An employing unit shall, within 30 days from the date of employment, apply to the social insurance agency for social insurance registration for its employees. Without social insurance registration, the social insurance agency shall verify the social insurance premium it should pay.